JPS5918495B2 - punching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drilling device that is used when digging a trench underground to a depth of 20 meters or more.

Conventionally, as shown in Fig. 6, there is a vertical guide frame E in which a vertical rod B having a grab bucket A and its power opening/closing device at its lower end is fixedly supported on the tip of a boom D of a fully hydraulic power shovel C.
The winches F and G Nona H2J mounted on the power shovel are inserted into the pulleys installed at the top and bottom of the vertical rod, respectively, so that the vertical rod B can be raised and lowered relative to the guide frame E. Although the perforation device provided through the hole has the advantage of increasing the lifting speed of the grab bucket, on the other hand, when the grab bucket is pushed into the bottom of the hole due to the tension of the Nona J, it is easy to force the Nona and cut the hole. When excavating deep strata, the grab bucket pull-up rope H is attached to the bottom of the hole.
Since the tension of the rope J may reach several times the tension of the grab bucket pushing rope J, there is a drawback that the Nona H breaks when pulling up the grab bucket.

The present invention addresses this problem by increasing the pushing force and pulling force of the grab bucket against the hole bottom without reducing the lifting speed of the grab bucket, and moreover, by increasing the pulling force significantly more than the pushing force, Regardless of the situation, the purpose is to make it easier to pull up the grab bucket and improve the drilling efficiency.

In the present invention, a sliding frame 3 through which a vertical rod 2 equipped with grab buckets 1, 1 and its power opening/closing device is inserted in a vertically movable manner at its lower end is attached to a vertical guide frame 4 that is fixedly supported on the ground. The grab bucket is installed so that it slides by the pushing stroke, and the guide frame 4 and the sliding frame 3 are connected by a hydraulic telescopic tube 5 so that the force for pushing up the sliding frame is greater than the force for pulling down the sliding frame. At the same time, a chuck device 6 for frictionally pinching and tightening the vertical rod 2 was attached to the sliding frame 3, and the lower part of the vertical rod 2 was suspended and supported by the sliding frame 3 via a Winonaph 0 winding cable 8. It is characterized by this.

An embodiment of the present invention will be described in more detail below with reference to FIGS. 1 to 5.

The cylindrical guide frame 4 is similar to the conventional fully hydraulic power excavator 9.
It is fixedly supported at the tip of the pool 10 so that the inclination angle can be adjusted.

In other words, in order to make it easier to attach the drilling device to the tip of the pool,
The other lower apex of a triangular member 12 whose lower apex is pivotally attached 11 to the tip of the pool 10 is connected to the poom 10 via a double-acting hydraulic cylinder 13, and a guide frame 4 is attached to the upper apex of the triangular member 12. The lower end is pivoted 14, and both sides of the upper end of the guide frame 4 and both sides of the triangular member 120 are connected by hydraulic cylinders 15, respectively.

Reference numeral 16 indicates a detachable retaining rod that connects the triangular member 12 and the swivel base 17, and 18 indicates a crawler.

The grab buckets 1 and 1 on both sides are hollow vertical rods 2 with a square cross section.
The power opening/closing device connects the upper part of the grab packet support frame 19 and each grab bucket 10 with a double-acting hydraulic cylinder 21 arranged symmetrically. It becomes.

A grab bucket guide shell 22 fits into a hole 23 bored by the grab bucket, and is assembled to the upper end of the grab bucket support frame 19.

A cylindrical sliding frame 3 inserted into the guide frame 4 so as to slide by the pushing stroke of the grab bucket against the hole bottom is provided with a head 24 at its upper end, and the head 24 and the guide frame 4 are connected to each other. They are connected by vertical hydraulic telescopic cylinders (double-acting hydraulic cylinders) 5 disposed on both sides.

The chuck device 6 has an outer casing 25 (
A friction plate 26 in which the vertical rod 2 is to be pressed (Fig. 3, Fig. 4);
27 is fitted so as to be slidable only in a direction perpendicular to the axis of the vertical rod, and both arm portions of both friction plates 26 and 27 are made to protrude outward from openings formed in the side walls of the outer casing 25, respectively. The opposing arm portions are connected by double-acting hydraulic cylinders 28, respectively.

Four guide rollers 29 and 30 (Fig. 1) are installed on the top surface of the head 24 of the sliding frame 3 and the top surface of the outer casing 25, respectively, to roll into contact with each outer wall surface around the vertical rod 2. The lifting resistance of the vertical rod 2 with respect to the frame 3 is reduced, and the axial line position of the vertical rod with respect to the sliding frame is determined.

In the diagram, there are sliding frames 3 above and below the guide frame 4.
It is recommended to install a similar guide roller device to guide the lift up and down (゛.

The hydraulic winch 7 is attached to the head 24 of the sliding frame 3, and the Nona 8 fed out from the 70-roll barrel passes through a pulley 31 pivoted within the lower end of the vertical rod 2, and then moves the Nona terminal to the head. It is fastened 32 to the portion 24.

The Nona 8 passes through guide rollers 33, 34 (FIG. 3) attached below the outer casing 25 at the lower end of the sliding frame to prevent the Nona 8 from interfering with the outer casing 25 or the guide frame 4.

Note that 35 is a stopper attached to the lower part of the outer casing 25 to prevent the Nona from falling off.

Reference numeral 36 denotes a hose guide leader (Fig. 1) fixed upright on the sliding frame head 24, and hydraulic hoses 37 and 38 extending from its upper end to the upper end of the vertical rod 2 and piping installed vertically inside the vertical rod 2. (not shown), the hydraulic cylinder 21 for opening and closing the grab bucket can be controlled to expand and contract by means of a hydraulic pump and a control valve device on the power shovel 9, regardless of whether the vertical rod 2 is raised or lowered.

The hydraulic winch 7 and hydraulic cylinders 5, 15, 28 can also be controlled by the hydraulic pump and control valve device via hydraulic hoses, respectively.

When drilling a hole, the hydraulic cylinder 21 is contracted from the state shown in the figure, the grab buckets 1, 1 are opened as shown by the chain lines in FIG. can also be lowered by its own weight), the chuck device 6 is opened, and the vertical rod 2 is supported by the winch nose 8 and lowered into the hole 23.

When the vertical rod 2 is supported by the grab bucket (1, 1.6qLIi&) at the lower end, the winch 7 is stopped, the hydraulic cylinder 28 is contracted, the vertical rod 2 is pinched by the friction plates 26 and 27, and the chuck device 6 fixes the vertical rod 2 to the sliding frame 3,
Next, the hydraulic telescopic cylinders 5, 5 are contracted, the sliding frame 3 is lowered relative to the guide frame 4, and the packet 1 is inserted into the bottom of the hole through the vertical rod 2.
・Let it be included.

Once the packet 1 has finished penetrating into the bottom of the hole, the full hydraulic cylinder 21 is extended to close the packets 1, 1, thereby digging the bottom of the hole, and then the hydraulic telescopic cylinders 5, 5 are extended. to separate packets 1, 1 from the bottom of the hole.

In this case, as shown in FIG. 5, the pressure-receiving area of the high-pressure side cylinder chamber 40 when the fluid-pressure telescoping cylinder 5 is expanded is determined by the pressure-receiving area of the high-pressure side cylinder chamber 41 when the fluid-pressure expandable cylinder 5 is contracted. Since the area is thicker (・, the pushing up force of the sliding frame 3 is significantly larger than the sliding frame pulling force,
Therefore, even if the bottom of the hole is clayey and requires a large pulling force to pull up the packet, the packet can be easily separated from the bottom of the hole.

Also, Nona 8 has a sliding frame 3. Because it is hung between two vertical rods,
When expanding and contracting the hydraulic extensible tube 5 with the sliding frame and the vertical rod fixed by the chuck device 6, the presence of the Nona 8 can be ignored, so the cylinder chamber 41 is set on the high pressure side and the packet 1 is placed at the bottom of the hole (・When loading the packet 1, the weight of the sliding frame and vertical rod 2 acts as a thrust for the packet 1, and the cylinder chamber 4
There is no problem even if the pressure receiving area of 1 is small. 0 When the packet is pulled away from the bottom of the hole, the hydraulic cylinder 28 is extended to open the chuck device 6. After that, the winch 7 is driven in the winding direction to 8 to lift the vertical rod 2 to the position shown in FIG. The excavated soil is discharged, the swivel table 17 is returned to the illustrated position, and the above-described drilling operation is repeated to proceed with the drilling work.

In the above-described embodiment, the winch 7 was attached to the head of the sliding frame 3 in order to facilitate attachment and detachment of the drilling device to the boom 10.
This also includes cases where it is installed on the side.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a front view of the main parts thereof, Fig. 3 is a detailed longitudinal sectional view of the first medical director's section, and Fig. 4 is an X-- An X-sectional view, FIG. 5 is a detailed view of the second fixing part, and FIG. 6 is a side view of the conventional device. DESCRIPTION OF SYMBOLS 1... Grab bucket, 2... Vertical rod, 3... Sliding frame, 4... Guide frame, 5... Fluid pressure telescopic tube, 6...
Chuck device, 7... winch, 8... nona, 9.
...Power shovel, 10...Boom, 19...Grab bucket support frame, 21...Hydraulic cylinder, 31...
·pulley.

Claims (1)

[Scope of Claims] 1. A sliding frame into which a vertical rod with a grab bucket and its power opening/closing device is inserted at its lower end so as to be able to move up and down is fixedly supported on the ground, and the grab bucket is attached to the bottom of the hole. The guide frame and the sliding frame are connected by a hydraulic telescopic cylinder so that the sliding frame pushing up force is greater than the sliding frame pulling down force. A drilling device characterized in that a chuck device for frictionally clamping and tightening the vertical rod is attached thereto, and the lower part of the vertical rod is suspended and supported from the sliding frame via a winch. 2. The drilling device according to claim 1, which is attached to a winch-like sliding frame for supporting a vertical rod.